As expected, the recent shootings in Sydney, Australia and Brown University in Rhode Island were followed up with cries for more stringent gun control measures. But in fact they demonstrate that most gun control laws do nothing to prevent violence. On Sunday a father-son team used legally-acquired weapons to fire upon a Jewish Hanukkah celebration at Bondi Beach in Sydney, Australia, killing 15 and injuring 39. The father was killed at the scene, and the son was injured. The Brown University shooting happened the day before. It targeted a classroom where a teaching assistant was conducting a final exam review...